[특허]Method and apparatus for controlling fuel/air mixture in a lean burn engine

[미국특허] Method and apparatus for controlling fuel/air mixture in a lean burn engine 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F02D-041/04 F02P-005/15
출원번호	US-0735105 (1996-10-22)
발명자 / 주소	Kubesh John Thomas Dodge Lee Gene Podnar Daniel James
출원인 / 주소	Southwest Research Institute
대리인 / 주소	Baker & Botts, L.L.P.
인용정보	피인용 횟수 : 30 인용 특허 : 18

초록 ▼

The system for controlling the fuel/air mixture supplied to a lean burn engine when operating on natural gas, gasoline, hydrogen, alcohol, propane, butane, diesel or any other fuel as desired. As specific humidity of air supplied to the lean burn engine increases, the oxygen concentration of exhaust gas discharged by the engine for a given equivalence ratio will decrease. Closed loop fuel control systems typically attempt to maintain a constant exhaust gas oxygen concentration. Therefore, the decrease in the exhaust gas oxygen concentration resulting from increased specific humidity will often be improperly attributed to an excessive supply of fuel and the control system will incorrectly reduce the amount of fuel supplied to the engine. Also, the minimum fuel/air equivalence ratio for a lean burn engine to avoid misfiring will increase as specific humidity increases. A relative humidity sensor to allow the control system to provide a more enriched fuel/air mixture at high specific humidity levels. The level of specific humidity may be used to compensate an output signal from a universal exhaust gas oxygen sensor for changing oxygen concentrations at a desired equivalence ratio due to variation in specific humidity specific humidity. As a result, the control system will maintain the desired efficiency, low exhaust emissions and power level for the associated lean burn engine regardless of the specific humidity level of intake air supplied to the lean burn engine.

대표청구항 ▼

[ What is claimed is:] [1.] A humidity compensation system for a lean burn combustion engine having a desired fuel/air ratio comprising:a temperature sensor for measuring the temperature of the air supplied to the engine;a humidity sensor for determining the relative humidity of the air supplied to the engine; anda processor operable to:receive a signal associated with the temperature from the temperature sensor;receive a signal associated with the relative humidity from the humidity sensor;calculate the specific humidity of the air supplied to the engine based on the signal received from the temperature sensor and the signal received from the humidity sensor;calculate a compensated desired fuel/air ratio based on the specific humidity of the air supplied to the engine.

이 특허에 인용된 특허 (18) 인용/피인용 타임라인 분석

Hattori ; Tadashi ; Yamaguchi ; Hiroaki ; Nakase ; Takamichi, Additional air control device for an internal combustion engine.
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Ito ; Osamu ; Hobo ; Nobuhito ; Suzuki ; Yutaka ; Kawamoto ; Itsushi ; Na itou ; Takashi ; Shiozaki ; Makoto ; Konishi ; Yoshimune, Air-to-fuel ratio control system for internal combustion engines.
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Yamamoto Tadahiro (Yokosuka JPX) Ohnishi Eiichi (Yokosuka JPX) Oota Tadaki (Fujisawa JPX) Oogane Hiroaki (Yokosuka JPX) Osuga Minoru (Katsuta JPX) Oyama Yoshishige (Katsuta JPX), Air/fuel ratio detecting apparatus for internal combustion engines.
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Mitsuda Tadao (Susono JPX) Iwata Minoru (Susono JPX) Sugiura Masatoshi (Obu JPX) Takada Shigetaka (Obu JPX) Watanabe Yukihiro (Nagoya JPX), Apparatus for controlling the amount of secondary air fed into an internal combustion engine.
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Stocker Herbert B. (Seeheim IL DEX) Deutsch Robert W. (Sugar Grove IL), Engine control system.
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Nonaka Kimihiro (Hamamatsu JPX) Ohtani Hiroaki (Hamamatsu JPX), Fuel injection control system for internal combustion engine.
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Gale Nigel F. (San Antonio TX) Naegeli David W. (San Antonio TX) Ryan ; III Thomas W. (San Antonio TX) King Steven R. (San Antonio TX), Fuel supply system for engines and combustion processes therefor.
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Gale Nigel F. (San Antonio TX) Naegeli David W. (San Antonio TX) Ryan ; III Thomas W. (San Antonio TX) King Steven R. (San Antonio TX), Fuel supply systems for engines and combustion processes therefor.
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Zeller Hans (Grafenau DEX) Brettschneider Johannes (Ludwigsburg DEX), Fuel-air mixture control apparatus.
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Kong ; deceased Hakchul H. (4631 Golden Meadow late of San Antonio TX) Kong ; administratrix Miyeon (4631 Golden Meadow San Antonio TX 78250), Fuzzy logic air/fuel controller.
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Lambert John E. (Dublin OH), Internal combustion engine control system.
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Burrahm Robert W. (both of ; San Antonio TX) Meyers David P. (both of ; San Antonio TX), Method and apparatus for controlling fuel flow to lean burn engines.
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Zeller Hans (Grafenau DEX) Latsch Reinhard (Vaihingen DEX) Brettschneider Johannes (Ludwigsburg DEX) Bianchi Valerio (Hochdorf DEX), Method and apparatus for engine fuel control.
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Brettschneider ; Johannes ; Bertling ; Johannes-Gerhard, Process and apparatus for the regulation of the fuel-air mixture of an internal combustion engine through the admission.
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Thring Robert H. (Devine TX), Regenerative internal combustion engine.
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Richeson ; Jr. William E. (Fort Wayne IN), Vehicle management computer.
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Richeson William E. (Fort Wayne IN), Vehicle management computer.
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Richeson William E. (Fort Wayne IN), Vehicle management computer.
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이 특허를 인용한 특허 (30) 인용/피인용 타임라인 분석

Boley,William C.; Ginzel,Geoffrey D.; Winkleman,Brady L., Charge density control for an internal combustion engine.
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Ismail, Ayman M; Bayer, Ethan E; Bucknell, John R, Continuous adaptation of an intake oxygen sensor for pressure, humidity and aging.
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Cullen Michael John, Engine control system and method with atmospheric humidity compensation.
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Sato, Masahiro; Iwaki, Yoshihisa; Ueno, Masaki; Akazaki, Shusuke; Haga, Takashi; Sato, Tadashi; Miyahara, Yasuyuki, Failure determination device for humidity sensor and control system for exhaust passage changeover valve.
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Soltis, Richard E., Fuel alcohol content detection via an exhaust gas sensor.
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Soltis, Richard E., Fuel alcohol content detection via an exhaust gas sensor.
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Soltis, Richard E.; Surnilla, Gopichandra; Hubbard, Carolyn Parks; Behr, Kenneth John; Clark, Timothy Joseph, Fuel alcohol content detection via an exhaust gas sensor.
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Soltis, Richard E.; Surnilla, Gopichandra; Hubbard, Carolyn Parks; Behr, Kenneth John; Clark, Timothy Joseph, Fuel alcohol content detection via an exhaust gas sensor.
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Gopp, Alexander Y.; Michelini, John Ottavio, Fueling control system.
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Surnilla, Gopichandra; Soltis, Richard E.; Makled, Dan A., Humidity and fuel alcohol content estimation.
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Surnilla, Gopichandra; Soltis, Richard E.; Makled, Daniel A., Humidity and fuel alcohol content estimation.
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Strubhar, Sean R.; Boley, William C., Humidity compensated charge density control for an internal combustion engine.
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Bhargava, Sumit; Dunnuck, David, Humidity compensation system for an internal combustion engine.
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Xiao, Nian; Ding, Yi, Humidity detection via an exhaust gas sensor.
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Pursifull, Ross Dykstra; Makki, Imad Hassan; Clark, Timothy Joseph; Uhrich, Michael James; Kumar, Pankaj, Humidity sensor and engine system.
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Pursifull, Ross Dykstra; Makki, Imad Hassan; Clark, Timothy Joseph; Uhrich, Michael James; Kumar, Pankaj, Humidity sensor diagnostics.
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Baldwin, Darryl D.; Strubhar, Sean R.; Yap, Choy, Method and apparatus configured to maintain a desired engine emissions level.
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Bruch, Kevin L.; Ginzel, Geoffrey D.; Reinhart, Michael J.; Shurman, Rodney M., Method and apparatus for controlling an engine.
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Zurloye,Axel; Ruthmansdorfer,Dave; Frazier,Tim; Rumsey,Jennifer, Method and apparatus for controlling an internal combustion engine using combustion chamber pressure sensing.
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Raffesberger,Raymond A., Method and apparatus for controlling stationary gaseous-fueled internal combustion engines.
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Auckenthaler, Theophil; Zaehner, Werner, Method and device for monitoring a humidity sensor in a combustion engine, using oxygen measurement of other sensors in the engine, such as NOx, lambda and/or oxygen sensors.
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Super, Leopold; Avery, Jr., Richard Michael; Longnecker, John Edward, Method for controlling condensate formation in an engine system.
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Makled, Daniel A.; Surnilla, Gopichandra; Soltis, Richard E.; McQuillen, Michael; Hakeem, Mohannad; Alobiedat, Lyth, Method for humidity measurement enablement.
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Basu, Amiyo K., Method of operating an engine.
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von Beck, Paul Gerhard, Motorized vehicles spark timing control for use with biofuel gasoline mixture.
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McFarland Steve ; Jones Wilbur, Renewable fuel generating system.
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MacNeille, Perry Robinson; Weber, David Charles, System and method for estimating ambient humidity.
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Cullen,Michael J., Vehicle engine control system utilizing humidity sensor.
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[미국특허] Method and apparatus for controlling fuel/air mixture in a lean burn engine 원문보기

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[미국특허] Method and apparatus for controlling fuel/air mixture in a lean burn engine 원문보기

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이 특허에 인용된 특허 (18) 인용/피인용 타임라인 분석

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